IPC Semester Test Review
Whether an object will sink or float in a fluid is determined by
Archimedes' principle
what's the correct order for the scientific method?
1. State the problem 2. Gather information 3. Form a hypothesis 4. Test hypothesis 5. Analyze the data 6. Draw conclusions
the buoyant force on an object in a fluid is equal to the weight of the fluid displaced by the object. This statement is ___
Archimedes' principle
Who created the periodic table?
Dmitri Mendeleev
Thermal expansion is a decrease in the size of a substance when the temperature is increased
False
the temperature at which a solid begins to liquify is its ______ point
melting
what is silicon
metalloid
All ____ except mercury are solids at room temperature.
metals
Sodium(Na) and Potassium(K) are both
metals
Electrons have a ________ charge.
negative
When a log burns in a fire __________________ ?
new substances are formed
what is neon
noble gas
a(n) _____ is a mixture that settles upon standing
suspension
the jars going from darker to lighter is an example of ___
suspension
the following are examples of a chemical property except ______
the ability to be crushed
what is iron
transition metal
The amount of space occupied by an object is its-
volume
H2O is also known as
water
____ is another name for a homogeneous mixture.
solution
1. 1,000 2. 0.1 3. 0.01 4. 0.001 5. 0.000001 6. 0.000000001
1. kilo 2. deci 3. centi 4. milli 5. micro 6. nano
A gas occupies 3.60 liters at a pressure of 1.12 kPa, what will be it's volume at at pressure of 4.00 kPa
1.008 liters
What is the correct volume for the picture shown? (Beaker)
115
14km= ________________m
14,000m
What is the group number for elements that have a stable number of electrons in their outer energy level?
18
A beaker contains 0.32 L of water. What is the volume of this water in milliliters?
320
convert 3.3 centigrams to milligrams
33 mg
A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is _____
56
what is the total number of atoms in the compound NH4Cl
6
How many electrons are needed in the outer energy level of the most atoms for the atoms to be chemically stable
8
1,800mL ____ 1.8L
=
The equation P1V1=P2V2 applies to
Boyle's law
Use your periodic table to determine which of these elements is most similar to Magnesium (Mg)
Calcium (Ca)
Which of the following notations represents a molecule
H2O
In applying Charles's law, temperature must be on the _____ scale.
Kelvin
When designing an experiment, the first step is to
State the problem
Why are elements in group 18 all stable
Their outer energy levels are full of electrons
a rotting apple is an example of
a chemical change
The elements that make up a compound and the exact number of atoms of each element in a unit of the compound can be shown as ___
a chemical formula
Coffee is an example of a _______________
a homogenous mixture
The following are examples of physical properties EXCEPT
ability to react with oxygen
What is lithium
alkali metal
what is calcium
alkaline earth metal
the smallest piece of an element that still retains the properties of the element is a(n)
atom
All substances are built from
atoms
In a chemical formula, the number of each type of atom in the compound is shown by the numbers called
subscripts
Three examples of physical change are
boiling of water, bursting of a balloon, and crumpling a piece of paper
Three examples of physical change are
boiling of water, bursting of a balloon, and melting of a candle
Which of the following is an example of a chemical change
burning paper
which of the following elements will likely form a negative ion in an ionic compound?
chlorine
Fog is an example of a ____.
colloid
What do two or more elements combine to form?
compound
a ___ is not a mixture
compound
A standard for comparison that helps to ensure that the experimental result is caused by the condition being tested is the
control
A factor that changes in an experiment from manipulation of the independent variable is the
dependent variable
The process for separating substances in a mixture by evaporating a liquid and condescending its vapor is called
distillation
In carbon dioxide, each oxygen atoms shares two pairs of electrons with the carbon atom. what type of bond is that called.
double covalent
A particle that moves around the nucleus is
electron
Each inner energy level of an atom has a maximum number of ____ it can hold.
electrons
The energy levels of an atom are occupied by
electrons
Compare and contrast the masses of protons, neutrons, and electrons
electrons have much less mass than protons or neutrons
Copper, sulfer, and oxygen are examples of
elements
An organized process used to gather observations and test a hypothesis is a(n)
experiment
temperature is defined as the average potenitial energy of particles in a substance
false
A chemical ______ tells what elements a compound contains and the exact number of the atoms of each element
formula
Elements that are in the same ______ have the same number of _____ in their outer energy level.
group;electrons
what is chlorine
halogen
The amount of energy required for a liquid at its boiling point to become a gas is ______
heat of vaporization
Aspartame is an artificial sweetener; its formula is C13H16N2O5. Which element in the formula has the largest number of atoms?
hydrogen
a ____ is a possible explanation for a problem using what you know and what you observe.
hypothesis
what is lanthanum
inner transition metal
A charged particle is known as a ____
ion
Atoms of the same element with different numbers of neutrons are called
isotopes
A(n) _________ is a mixture that doesn't scatter light
solution
Most of the mass of an atom is found in its
nucleus
Dot diagrams are used to represent
outer level electrons
Some elements are unlikely to lose or gain electrons, but share to form covalent bonds. Which of the following elements is most likely to form covalent bonds?
oxygen
Phosphorus and Sulfur are in the same
period
The horizontal rows on the periodic table are called
periods
The color of ink is a _____________ property
physical
a change in size, shape, or state of matter is called a _____ change
physical
The crushing of a can is an example of a
physical change
Density is an example of a
physical property
any characteristic of a material that can be observed or measured without changing the composition of the substances in the material is a
physical property.
In the compound H2O, the electrons in the bonds are unequally shared, making it a ___
polar molecule
Protons have a _______ charge.
positive
The nucleus of an atom is ______ charged
positively
Particles of matter that make up protons and neutrons are
quarks
Magnetism easily separates what mixture?
sand and iron
the attraction between particles gives a solid definite ___
shape and volume
Ice is an example of what state of matter?
solid
